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| Web URL(s): | http://archive.lib.msu.edu/tic/rpr/1993/Turfgrass/65316,%20Ok%20State,%20Taliaferro.PDF
Last checked: 11/20/2013
Requires: PDF Reader |
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| Publication Type:
| Report |
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| Material Type: | Manuscript |
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| Monographic Author(s): | Taliaferro, C. M.; Martin, D. L.; Anderson, J. A. |
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| Author Affiliation: | Taliaferro: Plant Breeder and Geneticist; Martin: Turfgrass Science & Extension; and Anderson: Plant Stress Physiologist, Oklahoma Agricultural Experiment Station, Oklahoma State University |
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| Monograph Title: | Breeding and Evaluation of Seeded Cold-Tolerant Bermudagrass Varieties and Bermudagrass Varieties for Golf Course Putting Greens: [1993 Annual Progress Report], 1993. |
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| Publishing Information: | [Stillwater, Oklahoma]: Oklahoma Agricultural Experiment Station, Oklahoma State University |
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| # of Pages: | 26 |
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| Collation: | 26 pp. |
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| Abstract/Contents: | "Objectives of the Oklahoma State University bermudagrass breeding program are to develop: (1) seed-propagated, cold-tolerant, fine-textured varieties for the U.S. transition zone; and (2) improved vegetatively-propagated varieties for golf course putting greens, with emphasis on adaptation to southern coastal states. Two bermudagrass, Cynodon dactylon, broad-based genetic populations have been developed using phenotypic recurrent selection. One population, C3fer-2tex, was developed from cold tolerant germplasm subjected to three and two cycles of selection, respectively, for increased fertility (seed set) and finer texture. The selection second population, C1ct, was more recently developed from germplasm with high seed yield potential but moderate cold tolerance. Selection was practiced within the population for increased cold tolerance and fine texture. Synthetic varieties derived from selected parental plants from C3fer-2tex have demonstrated good cold tolerance and turf quality in comparison to control varieties. Additional cyclic selection was completed within each of the broad base populations in 1993. Evaluation of more than 3,000 African bermudagrass, C. transvaalensis, progeny plants has demonstrated extensive variability for many characteristics. Wide variation exists for important turf performance traits such as response to high or low temperatures, low mowing tolerance, texture, and sod density. Variation also exists for color. The wide phenotypic variability is indicative of substantial genetic diversity within the species. Hybrid populations have been developed to study the magnitudes of genetic variances and heritabilites of selected traits. African selections have demonstrated finer texture, greater sod density, and greater cold tolerance than Tifgreen or Tifdwarf. The African bermudagrasses tend to have lighter green color, greater tendency to thatch, and greater susceptibility to scalping than conventional varieties. Morphologically or cytologically variant Tifdwarf plants were found among Ro progeny. Morphological variants are either more or less dwarfed than Tifdwarf. Cytological variants have chromosome numbers of 2n=45 or 2n=54. Alterations in protein synthesis associated with cold acclimation (CA) was studied in Midiron and Tifgreen turf bermudagrasses.. Acidic (pls of ca. 5 to 6) proteins of ca. 34 kD were diminished in crowns of both varieties following CA. Both varieties synthesized cold-regulated (COR) proteins of several size ranges, including ca. 14 to 15 kD, 20 to 28 kD, 32 to 37 kD, and 45 to 55 kD, in association with CA. Midiron crowns synthesized low molecular weight (MW) (ca. 20 to 28 kD) basic (pls. of ca. 7 to 9) COR proteins in greater numbers and amounts, and intermediate MW (ca. 32 to 37 kD) acidic (pls of ca. 4 to 6) COR proteins in greater amounts than Tifgreen crowns." |
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| Language: | English |
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| References: | 0 |
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| See Also: | See also related summary article "Breeding and evaluation of seeded cold-tolerant bermudagrass varieties" 1993 Turfgrass Research Summary [USGA], 1993, p. 16-17, R=65316. R=65316 |
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| Note: | Also appears as pp. 00055-00081 in the USGA Turfgrass Research Committee Reporting Binders for 1993.
"For the Period: 1 November 1992-31 October 1993"
Pictures, color
Tables |
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| Web URL(s):
http://archive.lib.msu.edu/tic/rpr/1993/Turfgrass/65316,%20Ok%20State,%20Taliaferro.PDF
Last checked: 11/20/2013
Requires: PDF Reader |
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